Fire detectors utilizing an ionization chamber not subject to co

Details Fire detectors utilizing an ionization chamber not subject to co Fire detectors utilizing an ionization chamber not subject to co

1979-09-05

1981-12-29

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250384, H01J 3928

Patent

active

043084583

ABSTRACT:
Condensation of water vapor on a radiation source in a fire detector is prevented by heating the source using the Joule effect. The heat is provided by a resistor embedded in the ceramic support for the source.

REFERENCES:
patent: 3028490 (1962-04-01), Guilleux
patent: 3961195 (1976-06-01), Newington et al.

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